749639 has 8 divisors (see below), whose sum is σ = 853632. Its totient is φ = 651640.

The previous prime is 749587. The next prime is 749641. The reversal of 749639 is 936947.

749639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 749639 - 2⁸ = 749383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (749659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1229 + ... + 1734.

It is an arithmetic number, because the mean of its divisors is an integer number (106704).

2⁷⁴⁹⁶³⁹ is an apocalyptic number.

749639 is a deficient number, since it is larger than the sum of its proper divisors (103993).

749639 is a wasteful number, since it uses less digits than its factorization.

749639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2997.

The product of its digits is 40824, while the sum is 38.

The square root of 749639 is about 865.8169552509. The cubic root of 749639 is about 90.8414499569.

The spelling of 749639 in words is "seven hundred forty-nine thousand, six hundred thirty-nine".